Update FFT interface to be compatible with heffte v 2.2.0
New communication options and some backward compatibility is broken with heffte v 2.2.0. In this MR the heffte interface in IPPL is updated to account for these changes.
Code indexing in gitaly is broken and leads to code not being visible to the user. We work on the issue with highest priority.
New communication options and some backward compatibility is broken with heffte v 2.2.0. In this MR the heffte interface in IPPL is updated to account for these changes.